export const IEVersion = () => {
  var userAgent = navigator.userAgent // 取得浏览器的userAgent字符串
  var isIE = userAgent.indexOf('compatible') > -1 && userAgent.indexOf('MSIE') > -1 // 判断是否IE<11浏览器
  var isEdge = userAgent.indexOf('Edge') > -1 && !isIE // 判断是否IE的Edge浏览器
  var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf('rv:11.0') > -1
  if (isIE) {
    var reIE = new RegExp('MSIE (\\d+\\.\\d+);')
    reIE.test(userAgent)
    var fIEVersion = parseFloat(RegExp['$1'])
    if (fIEVersion === 7) {
      return 7
    } else if (fIEVersion === 8) {
      return 8
    } else if (fIEVersion === 9) {
      return 9
    } else if (fIEVersion === 10) {
      return 10
    } else {
      return 6 // IE版本<=7
    }
  } else if (isEdge) {
    return 'edge' // edge
  } else if (isIE11) {
    return 11 // IE11
  } else {
    return -1 // 不是ie浏览器
  }
}
export function setCookie(c_name,value,expire) {
  var date=new Date()
  date.setSeconds(date.getSeconds()+expire)
  document.cookie=c_name+ "="+escape(value)+"; expires="+date.toGMTString()
  //console.log(document.cookie)
 }
   
 export function getCookie(c_name){
  if (document.cookie.length>0){
   let c_start=document.cookie.indexOf(c_name + "=")
   if (c_start!=-1){ 
    c_start=c_start + c_name.length+1 
    let c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
     return unescape(document.cookie.substring(c_start,c_end))
    } 
   }
  return ""
 }
   
 export function delCookie(c_name){
  setCookie(c_name, "", -1)
 }
